depreciation vs retard

depreciation and retard both are nouns.

Word	Noun	Adjective	Verb	Adverb
depreciation	Yes	No	No	No
retard	Yes	No	Yes	No

depreciation (noun)	retard (noun)
a decrease in price or value	a person of subnormal intelligence
a communication that belittles somebody or something
decrease in value of an asset due to obsolescence or use

depreciation (verb)	retard (verb)
	lose velocity; move more slowly
	cause to move more slowly or operate at a slower rate
	slow the growth or development of
	be delayed